Results 41 to 50 of about 4,039 (174)

Fed-Batch Cultivations of Rhodospirillum rubrum Under Multiple Nutrient-Limited Growth Conditions on Syngas as a Novel Option to Produce Poly(3-Hydroxybutyrate) (PHB)

Frontiers in Bioengineering and Biotechnology, 2019
Syngas from gasified organic waste materials is a promising feedstock for the biotechnological synthesis of the bioplastic poly([R]-3-hydroxybutyrate) (PHB) with Rhodospirillum rubrum. In a first approach, growth studies were carried out with this strain
Stephanie Karmann, Stephanie Karmann, Sven Panke, Manfred Zinn   +3 more
doaj   +1 more source

No Light, No Germination: Excitation of the Rhodospirillum centenum Photosynthetic Apparatus Is Necessary and Sufficient for Cyst Germination

mBio, 2021
Environmental cues that signal Gram-positive spores to germinate (termed germinants) have been identified for several ...
Nandhini Ashok, Kuang He, Carl E. Bauer
doaj   +1 more source

DNA‐Enzyme Hybrid Nanostructures: Functional Materials to Modulate Enzymatic Activity

Small, Volume 22, Issue 43, 3 August 2026.
DNA–enzyme hybrid nanostructures enable precise spatial and stoichiometric control over enzyme organization, offering a powerful platform to modulate catalytic activity. This review critically evaluates key mechanistic hypotheses, including proximity effects, microenvironment changes, confinement, and stabilization, as well as highlighting ...
Manar Elnaggar, Amelie Heuer‐Jungemann
wiley   +1 more source

Bio-inspired building blocks for all-organic metamaterials from visible to near-infrared

Nanophotonics, 2023
Light-harvesting complexes in natural photosynthetic systems, such as those in purple bacteria, consist of photo-reactive chromophores embedded in densely packed “antenna” systems organized in well-defined nanostructures.
Holder Samuel Thomas, Estévez-Varela Carla, Pastoriza-Santos Isabel, Lopez-Garcia Martin, Oulton Ruth, Núñez-Sánchez Sara   +5 more
doaj   +1 more source

Photosynthetic primary production in the Mesoproterozoic

New Phytologist, Volume 251, Issue 1, Page 64-80, July 2026.
Summary The Mesoproterozoic atmosphere had more CO2 and less O2 than at present. While the upper ocean was oxygenated, the deeper ocean was euxinic or ferruginous. Primary production was performed by Chlorobia, Cyanobacteria, Proteobacteria, and Archaeplastida.
Patricia Sánchez‐Baracaldo, John A. Raven   +1 more
wiley   +1 more source

Syngas obtained by microwave pyrolysis of household wastes as feedstock for polyhydroxyalkanoate production in Rhodospirillum rubrum

Microbial Biotechnology, 2017
Summary The massive production of urban and agricultural wastes has promoted a clear need for alternative processes of disposal and waste management.
Olga Revelles, Daniel Beneroso, J. Angel Menéndez, Ana Arenillas, J. Luis García, M. Auxiliadora Prieto   +5 more
doaj   +1 more source

H⁺-Translocating Membrane-Bound Pyrophosphatase from Rhodospirillum rubrum Fuels Escherichia coli Cells via an Alternative Pathway for Energy Generation

Microorganisms, 2023
Inorganic pyrophosphatases (PPases) catalyze an essential reaction, namely, the hydrolysis of PPi, which is formed in large quantities as a side product of numerous cellular reactions.
Evgeniya A. Malykh, Liubov I. Golubeva, Ekaterina S. Kovaleva, Mikhail S. Shupletsov, Elena V. Rodina, Sergey V. Mashko, Nataliya V. Stoynova   +6 more
doaj   +1 more source

Maturation and Catalysis of a Clade E Carbon Monoxide Dehydrogenase Encoded in a CooCTJ‐Operon From Clostridium pasteurianum BC1

ChemBioChem, Volume 27, Issue 11, 15 June 2026.
This study reveals how Clostridium pasteurianum BC1's clade E carbon monoxide dehydrogenase (CODH‐III) achieves catalytic activity even without its native maturation proteins (CooCTJ), stimulating new interpretations of CODH maturation. Electron paramagnetic resonance (EPR) spectroscopy displays canonical C‐cluster signal.
Maximilian Böhm, Henrik Land
wiley   +1 more source

Effects of Mixing Volatile Fatty Acids as Carbon Sources on Rhodospirillum rubrum Carbon Metabolism and Redox Balance Mechanisms

Microorganisms, 2021
Rhodospirillum rubrum has a versatile metabolism, and as such can assimilate a broad range of carbon sources, including volatile fatty acids. These carbon sources are gaining increasing interest for biotechnological processes, since they reduce the ...
Paloma Cabecas Segura, Quentin De Meur, Audrey Tanghe, Rob Onderwater, Laurent Dewasme, Ruddy Wattiez, Baptiste Leroy   +6 more
doaj   +1 more source

Corn response to biological products and a nitrification inhibitor

Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.
Abstract Atmospheric nitrogen (N2) is converted into ammonia (NH3), a form that plants can use, through biological nitrogen (N) fixation by various microorganisms and bacterial genera. This study assessed the field performance of three biological N‐fixing products, or biostimulants (BS), including Gluconacetobacter diazotrophicus (BS1), Klebsiella ...
Rose M. Paul, Gurbir Singh, Kelly A. Nelson, Gurpreet Kaur   +3 more
wiley   +1 more source